Development of 80MnCr Steel Bar for Grinding Ball by 70t-BOF-LF-VD-CC-HR Flowsheet

刘发友; 王国承; 汪琦; 田钱仁; 毛福来

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Development of 80MnCr Steel Bar for Grinding Ball by 70t-BOF-LF-VD-CC-HR Flowsheet

更新时间：2026-01-21

- Development of 80MnCr Steel Bar for Grinding Ball by 70t-BOF-LF-VD-CC-HR Flowsheet
- Special Steel Vol. 38, Issue 3, Pages: 37-40(2017)
- 作者机构：
  
  1. 辽宁科技大学材料与冶金学院,鞍山,114051
  2. 山东寿光巨能特钢有限责任公司，寿光,262700
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：17 December 2016，
  
  Online First：20 July 2022，
  
  Published：20 July 2017
- 稿件说明：
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刘发友, 王国承, 汪琦, et al. Development of 80MnCr Steel Bar for Grinding Ball by 70t-BOF-LF-VD-CC-HR Flowsheet[J]. Special Steel, 2017, 38(3): 37-40.
DOI：

刘发友, 王国承, 汪琦, et al. Development of 80MnCr Steel Bar for Grinding Ball by 70t-BOF-LF-VD-CC-HR Flowsheet[J]. Special Steel, 2017, 38(3): 37-40. DOI：

摘要

试制的80MnCr钢（/%:0.79~0.81C

0.92~0.97Mn

0.26~0.32Si

0.009~0.017P

≤0.005S

0.92~0.97Cr

0.06Mo

0.03~0.05Ti

0.027~0.032Al

0.00040~0012O）的生产流程为BF-70t BOF-LF-VD-Φ450mm圆坯连铸-Φ90mm棒材轧制。通过控制BOF终点[P]≤0.015%

终点[C]≥0.12%

出钢用1.5kg/t钢芯铝预脱氧、LF喂铝线脱氧

精炼渣碱度≥4

VD后喂钙线

连铸结晶器和末端电磁搅拌等工艺措施

钢中非金属夹杂物级别为:粗系0、细系≤0.5;低倍组织级别为:中心疏松≤1.5、一般疏松≤0.5、中心偏析≤0.5、锭型偏析0;钢材经超声波无损探伤检测

合格率达93.07%。

Abstract

The production flowsheet of pilot-produced steel 80MnCr (/%: 0.79~0.81C

0.92~0.97Mn

0.26~0.32Si

0.009~0.017P

≤0.005S

0.92~0.97Cr

0.06Mo

0.03~0.05Ti

0.027~0.032Al

0.0004~0.0012O) is BF-70t BOF-LF-VD-Φ450mm Round bloom casting-rolling to Φ90mm bar. With the process measures including controlling BOF end [P]≤0.015% and end [C]≥0.12%

pre-deoxidizing with 1.5kg/t steel cored aluminium at tapping

deoxidation by feeding aluminium wire in LF

refining slag basicity N4

after VD feeding calcium wire

mold-EMS and end-EMS in casting

the rating units of inclusions in steel are heavy series 0 and thin series ≤0.5

the rating of macrostructure are central porosity ≤1.5

general porosity ≤0.5

central segregation ≤0.5 and ingot square-segregation zone 0； and the qualified rate of steel products by ultrasonic nondestructive measuring is up to 93.07%.

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